The four demons of Zhan Yu had already returned to their residence from Daxueping, cultivating behind closed doors, refining the demon pill, and increasing their cultivation.

That day, the transaction in Daxueping can be described as smooth sailing, seven weapons obtained from the eight kings of Wolf Mountain, as soon as Fang took it out, a large group of sand diggers surrounded him, competing for bids, and the four demons knew that there were many demon cultivators who did not have a treasure refining method among the sand diggers.

Thinking about it, with the benevolence and righteousness of the Qilin clan, he preached to the genus of the beasts of the wilderness, and did not give the alchemy method, which shows that it is precious and rare.

Now it seems that the three-yuan treasure forbidden given by Luo Lao, although it is widely spread, is not just a monster, but the four demons get it easily, thinking that other demons also know how to refine treasures.

As for whether there will be monsters who want to make money, then don't worry, the strength of the eight kings of Wolf Mountain is not bad, and the four demons can destroy the eight kings with four enemies and eight enemies, and the strength has spread.

When the four demons took out these weapons, the sand diggers who had a heart already knew the origin of the four demons, and they would not have bad intentions.

In the end, the seven weapons were exchanged for 2,800 catties of cold iron sand, and the thousand-eyed snake girl felt that she had taken advantage of it, and insisted on giving Zhan Yu Jinhuan some compensation.

But Zhan Yu Jinhuan firmly refused, since the account has been divided, whoever is whomever belongs to whom, as for which is more important, it depends on their own vision, and they can't regret it afterwards, this is the rule.

Besides, Zhan Yu is also quite satisfied with the mace he got, the wolf tooth and himself can be said to be in the same vein, this mace is often used by him to warm and refine the five elements of mana, if it is not for Zhan Yu to use the knife, he can directly use it, that is, it is re-smelted into a knife, and it also saves a lot of effort to warm up.

And if the gold ring wants to refine a set of gold needles, it is not a magic weapon that pays attention to weight, and it will not be accepted.

During the cultivation period, the snake girl and Jinhuan went to Daxueping a few more times, and Qianmu followed Zhan Yu to rest assured, so he concentrated on refining the demon pill.

The sun rises and the moon sets, the heaven and the earth alternate between black and white, and in the blink of an eye, the seven-seven-forty-nine day period has arrived, Zhan Yu has already taken advantage of this day to digest the two demon pills, and cultivate them to improve again, with the implication of breaking through, he is excited in his heart, but he still presses the mana, and when and where to break through the retreat still needs to be carefully considered.

If you are disturbed by other demons when you break through due to carelessness, it will be more than worth the loss.

On this day, everything is ready, and the four demons who have adjusted their state come to the place where the fire room is located, and hand over their iron cards to the fire room manager, and there are special little demons to lead the four demons to their respective fire rooms.

Zhan Yu said goodbye to his companions, and followed the little demon who led the way, and walked towards the fire room he rented, and looked at it while walking, there were many stone chambers in this cave, and there were cloud patterns, and he didn't see or hear anything extraordinary all the way, and secretly estimated that the mysteries of the fire room were all inside it.

Leaning slightly, the little demon who led the way took Zhan Yu to the door of a stone room, this stone room has a stone door, the door is engraved with moire, the lines are intersected, Zhan Yu does not understand its meaning, only know that this moire is the same as the moire on the iron card in his hand, think that this moire is similar to the room number, this iron card is the key to opening the door.

The little demon who led the way motioned to Zhan Yu to show the iron card to the stone gate, only to see the cloud pattern on the stone gate appear, echoing the iron plate cloud pattern, and then saw the stone gate rumbling and slowly opening open.

The little demon who led the way said: "The fire room is open and closed, just show the iron card, remember not to overdue, please." ”

Zhan Yu nodded in understanding, and said politely, "Thank you, messenger." ”

The little demon nodded in return and left, after all, there were other demon cultivators who needed to guide the way, Zhan Yu also turned around and entered the stone room, after all, the time was limited and needed to hurry, the stone door slowly fell and closed after Zhan Yu entered, only those who held the iron plate with the same number could open it, but there was no need to worry about the demon coming to disturb.

"This is the fire room. ”

The stone room is simple, everything is in the bottom of the eye, but it is better in the open, there is a fire well in the center, the red light is rising, Zhan Yu walked to the fire well, only to find that the flame in the well burst abnormally, but it was only detained by the fire well, so that the fire would not leak out.

"Dharma Eye, open!"

Mana poured into the center of his eyebrows, Zhan Yufa's eyes opened, and he looked at the fire well, only to see that the fire well runes flashed, and the Dao Dao law patterns crisscrossed and gathered the flames within three feet of the well.

Zhan Yu was just curious, and after checking it, he closed his eyes.

There is a tripod next to the fire well, and there is a square mold, at a glance, you can see that the tripod is used to smelt cold iron sand, and the mold is the thing that holds molten iron.

Zhan Yu didn't hesitate, with a wave of mana, he moved the tripod onto the fire well, and then threw the mace made of cold iron sand into the tripod, waiting for it to turn into molten iron.

The mace was refined and warmed very well, and it was unusually strong, but it lost the demon lord and became a rootless wood, and the flames in the fire well were raging, inexhaustible, and it was only a matter of time before it was refined.

Finally, the gray mace was like a boiled shrimp and crab, and the skin was flushed with a touch of red, and the red gradually infected from the surface and the inside, and finally became a red iron rod.

The high temperature continued, and the mace of steel and iron bones was finally pulled away from the bones by the flames, and the tail of the rod melted first, then collapsed upward, and a pot of red and bright molten iron soup began to tumble.

"It took three days and three nights for this mace to finally turn into molten iron!"

Zhan Yu opened his eyes, his excitement overflowing, and he was about to start building his first iron weapon.

The corpse of a wolf demon was taken out of the personal gourd by Zhan Yu, and Zhan Yu muttered: "If a treasure knife wants to have spirituality, it is always indispensable to donate blood, so you can turn into a machine spirit and accompany the knife!"

The demon corpse was thrown into the molten iron, it was really like cooking oil in a blazing fire, the molten iron tumbled violently, wrapped in the demon corpse and slowly refined, the wolf was known as the copper head and iron bone tofu waist, and sure enough, the wolf head insisted until the end before it fused with the molten iron.

This tripod is specially used for smelting iron sand, since there is a water outlet, open the water outlet, Zhan Yu uses the mold to export the molten iron, and immediately puts the mold on the ground, while the molten iron is slowly solidifying, the mana is driven into the mold, the mana is pulled, and the prototype gradually appears.

"The billet has become, but the forging of a treasure knife is indispensable for hammering, planing and filing, polishing, inlaying, quenching and many other steps, now I cast the knife with mana, the general procedure can be omitted, but this hammering, quenching is the top priority, can not be saved!"

Zhan Yu removed the tripod on the fire well and took out iron tongs, hammers, and iron pillows.

When he received the iron plate that day, the steward of the fire room explained what objects were in the fire room, and replaced them with other demon cultivators, and the objects in the fire room were enough, just turn the iron sand into molten iron, import it into the mold, and use mana to pinch it into the shape of the weapon he wanted, and the rest was to slowly sacrifice and cultivate and refine.

But after all, Zhan Yu has experience in his previous life, and his requirements are higher, and he needs to bring his own equipment.

Hammering is a boring and high-precision job, its strength and frequency have strict requirements, Zhan Yu holds the pliers in his left hand, and the hammer in his right hand takes a deep breath and concentrates.

"Qiang ...... Qiang ...... Qiang ......"

The steady rhythm of the clash of gold and iron echoed in the fire room, but it was stopped by the stone door of the fire room, and it was still quiet outside the fire room, and there were constantly guiding demons to introduce new sand diggers into the vacated fire room.

In the process of beating, Zhan Yu also had to use both sides of his mind to ban the three ingots into it, wasting energy and mana, which was undoubtedly a double test.

For a day, two days, and three days, the beating in the fire room continued, until the beating finally stopped in the evening of the sixth day.

"It's finally done!"

A slender and straight ring-headed knife lies quietly on an iron pillow, this knife has a single-sided blade, a thick ridge, and an inner arc, which is conducive to chopping.

"All that's left is quenching!"

Of course, quenching is also exquisite, in Zhan Yu's simple values, the more precious the water, the better the effect, the most precious water in his hand is the Taiyin spiritual liquid, but this water is too precious, he can only use the diluted Taiyin spiritual liquid quenching.

Taking out the stone tripod used for cooking, Zhan Yu poured the collected mountain spring water into it, and took out a jade bottle and a stone cup from the gourd.

"I hope this cup of Taiyin Spiritual Liquid can be effective!"

Zhan Yu poured the real water into the small cup, raised the small cup and solemnly sprinkled it into the water.

"Whew......"

The blade of the knife is submerged in the water, the hot blade of the knife, the cold mountain spring water is boiled, the sound of boiling is like a wolf howling, thrilling, endless, by the way, a large amount of water mist is produced, and there seems to be a wolf shadow churning in the fog.

"The vision is revealed, and the sword is made!"

Zhan Yu happily pulled the blade out of the water, only to see that the blade was rough and more refined, and the scales of the dog's teeth were attached to it, and the straight and narrow blade contained a fierce murderous aura.